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Configure Model to Run in External Mode over Wi-Fi or Serial

To configure a model to run in External mode over Wi-Fi® or Serial network:

  1. Open a model that is configured for External mode. For example, open Communicating with Arduino Mega 2560 Hardware by typing

    in the MATLAB® command prompt.

  2. Open the Configuration Parameters dialog box.

  3. Browse to External mode > Communication interface parameter.

    • WiFi shield: If you are using WiFi Shield for Wi-Fi connectivity, select WiFi shield.

      If a Simulink® model already uses blocks from the WiFi library, External mode over Wi-Fi is not supported.

    • ESP8266: If you are using ESP8266 for Wi-Fi connectivity, select Serial.

      When running a model in External mode over serial, Simulink generates error if the Hardware Serial Port parameter is set to Serial 0. The error is generated because the External mode uses serial port 0 to communicate with the Arduino® board by default. In WiFi properties, set the Hardware Serial Port parameter to a value other than Serial 0.


      External mode with ESP8266 for Arduino Uno is not supported.

    • MKR1000, MKR WIFI 1010: If you are using MKR1000 or MKR WIFI 1010 for Wi-Fi connectivity, select Serial or WiFi.

  4. Make sure that you have configured the Wi-Fi properties as described in Configure Network Settings for Wi-Fi.

  5. Click Apply.

    Your model is configured to run in External mode.


For normal mode and external mode, the IP address you have specified is used, by default.